US6006794A - Device to block weft yarn during cutting on a weft feeder - Google Patents

Device to block weft yarn during cutting on a weft feeder Download PDF

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Publication number
US6006794A
US6006794A US09/043,651 US4365198A US6006794A US 6006794 A US6006794 A US 6006794A US 4365198 A US4365198 A US 4365198A US 6006794 A US6006794 A US 6006794A
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United States
Prior art keywords
yarn
core
channel
weft
weft yarn
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US09/043,651
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English (en)
Inventor
Marco Covelli
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nuova Roj Electrotex SRL
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Nuova Roj Electrotex SRL
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Publication date
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Assigned to NUOVA ROJ ELECTROTEX S.R.L. reassignment NUOVA ROJ ELECTROTEX S.R.L. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: COVELLI, MARCO
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    • DTEXTILES; PAPER
    • D03WEAVING
    • D03DWOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/34Handling the weft between bulk storage and weft-inserting means
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H63/00Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
    • B65H63/08Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to delivery of a measured length of material, completion of winding of a package, or filling of a receptacle
    • B65H63/088Clamping device
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2555/00Actuating means
    • B65H2555/10Actuating means linear
    • B65H2555/13Actuating means linear magnetic, e.g. induction motors
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00Handled material; Storage means
    • B65H2701/30Handled filamentary material
    • B65H2701/31Textiles threads or artificial strands of filaments

Definitions

  • the present invention concerns improvements in measuring weft feeders for fluid jet looms, namely those special weft yarn feeders from which the yarn is drawn by the main nozzle of the loom and the yarn turns being unwound from the weft feeder drum are counted through an appropriate system.
  • the present invention proposes to solve the problems arising just after the weft yarn has been stopped and, in particular, to provide for an efficient blocking of said yarn just after it has been cut by the appropriate cutting devices of the loom.
  • the present invention now proposes instead to thoroughly solve the problem by means of a totally new device, which is able to firmly block the weft yarn at the outlet of the weft feeder while its cutting takes place in the loom.
  • the core is suitably cylindrical and its diameter is wider than that of the channel crossed by the weft yarn, while the contrast surface of the bush comprises a bottom layer of damping material and a covering of shockproof and wear resistant material.
  • the spring return means which consist of a cylindrical helical spring, tend to keep the core in tight engagement with said contrast surface inside the channel, so as to block the weft yarn
  • said electromagnetic means which consisting of a coil surrounding said core, when energized, lead said core out of the channel, causing it to disengage from said surface and to release the weft yarn, leaving it free to cross the channel of the device.
  • FIG. 1 is an axial section view of the device, showing the weft yarn blocking core and the spring means associated thereto in an inactive condition;
  • FIG. 2 is an axial section view of the device, showing the weft yarn blocking core and the spring means associated thereto in an active condition.
  • the device to block the weft yarn of the present invention essentially consists of a single elongated body 1 with longitudinal axis 2, comprising an inlet cone 3 and a cylindrical channel 4 meant to be crossed by the weft yarn F, the cone 3 and the channel 4 being aligned with their axes coinciding with the axis 2 of the body 1.
  • the device is meant to be associated to measuring weft feeders for fluid jet looms, to which it is applied by way of the cone 3 just downstream of the outlet yarn guide and/or of the antiballoon device of said feeders.
  • the body 1 of the device according to the invention comprises moreover a cylindrical core 5 to block the weft yarn F, movable into a guide 6 perpendicularly to the axis 2 and adapted to penetrate into the channel 4 through a transversal opening 7 thereof.
  • Electromagnetic means in the form of a coil 8 surround the core 5, onto which there also acts a cylindrical helical spring 9.
  • a bush 11 is associated to the channel 4 in correspondence of the opening 7, so as to form a contrast surface 10 onto which the core 5 engages in order to block the weft yarn F.
  • the contrast surface 10 comprises a bottom layer of damping material and a covering of shockproof and wear resistant material.
  • the device according to the invention is normally inactive (FIG. 1) to allow the weft yarn F to freely cross the channel 4.
  • the coil 8 which, overcoming the action of the return spring 9, causes the core 5 to move backward (as shown in FIG. 1) disengaging from the surface 10, and leads said core out of the channel 4.
  • the device becomes active (FIG. 2), in that the spring 9 pushes the core 5 into the opening 7 of the channel 4 (as shown in FIG. 2) and presses it against the contrast surface 10 of the bush 11, so as to block the weft yarn F, crossing said channel, between the core 5 and the surface 10.
  • the device according to the invention is inactive (FIG. 1) when the weft yarn F is being inserted into the loom; during this step, the yarn is free to slide through the channel 4, the core 5 being kept out of the opening 7 by the coil 8, suitably energized, which attracts it against the action of the return spring 9.
  • the device becomes active (FIG. 2) at the end of the weft yarn insertion step, by de-energizing the coil 8: the spring 9 thus moves the core 5 back into the opening 7 of the channel 4 so as to block the weft yarn F against the surface 10 of the bush 11. In this condition, the yarn can no longer slide through the channel 4, nor loosen around the drum of the measuring weft feeder.
  • the de-energizing of the coil 8, to turn the device active is carried out somewhat later than the issue of the last signal indicating that the weft yarn turns have unwound from the drum of the measuring weft feeder, namely when the weft yarn has positively stopped (at the end of insertion in the loom), and before it is cut by the appropriate means provided in the loom. It is actually in this step that the weft yarn is kept firmly gripped between the core 5 and the contrast surface 10, and it remains in this condition during cutting and up to start of the following insertion.
  • the object of the invention is thereby reached. It is in fact just after the cutting step that the oscillations on the weft yarn may be produced, involving the previously described inconveniences.
  • the device of the invention thus proves to be extremely helpful to eliminate such drawbacks, as it prevents undesired waves travelling backwards from the loom cutting devices through the launching nozzle from extending up to the weft yarn length between the yarn guide at the outlet of the measuring weft feeder (and now the device of the invention) and the yarn reserve drum, thereby ruffling the yarn turns wound thereon.
  • the core 9 is then returned to its inactive position by energizing the coil 8 and thus freeing again the channel 4 at the start of the next weft yarn insertion.
  • the device according to the invention is normally associated to a measuring weft feeder, so as to form an integrating part thereof, by way of its inlet cone 3 acting as an efficient element of connection with the antiballoon device usually provided at the outlet of said feeders.
  • said device can be simply mounted downstream of the outlet yarn guide of the measuring weft feeder.
  • the device of the present invention is full of advantageous properties, which contribute to the efficient operation of the weft feeders to which said device is associated and of the looms adopting such feeders.
  • advantageous properties which contribute to the efficient operation of the weft feeders to which said device is associated and of the looms adopting such feeders.
  • the device of the invention is adapted to complete a nozzle for the automatic insertion of the weft yarn, whereby, connected to other devices commonly used on measuring weft feeders for fluid jet looms, it allows to obtain the full insertion of the weft yarn from the inlet to the outlet of the feeder.
  • the device of the invention can be mounted on automatic systems provided to mend the weft yarn, wherein it may be required to launch the yarn through the weft feeder up to the loom nozzle.
  • the device of the invention can be easily connected at the outlet of a funnel-shaped antiballoon device.
  • the device of the invention when inactive, leaves the channel crossed by the yarn totally free, and thus by no means hinders the sliding of the yarn during its insertion.
  • the device of the invention facilitates the operation of manual reinstatement of the weft yarn reserve, preventing when the yarn winding member starts to operate, said yarn from being pulled backward towards the weft feeder drum, thereby slipping out of the operator's hand and thus requiring to be inserted again into the antiballoon device, or into the yarn guide eyelet at the outlet of the feeder.
  • the device of the invention is controlled directly by the weft feeder and thus operates in full synchronism with the actual position of the weft yarn, with no need to use any further mechanical elements connected to the loom, or any sensors or signals to establish said synchronism.
  • the action of the device and of the core to block the weft yarn can be obtained through electromagnetic means, instead of spring means, while spring means could be used to stop the action of said device; likewise, use could be made of electromagnetic means, either on their own, or combined with spring means, both to make the device active and to keep it inactive.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Quality & Reliability (AREA)
  • Looms (AREA)
US09/043,651 1995-09-27 1996-09-26 Device to block weft yarn during cutting on a weft feeder Expired - Fee Related US6006794A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ITM195A01983 1995-09-27
IT95MI001983A IT1277659B1 (it) 1995-09-27 1995-09-27 Dispositivo di blocco del filo di trama in fase di taglio associabile a porgitrama misuratori
PCT/EP1996/004218 WO1997012084A1 (en) 1995-09-27 1996-09-26 Device to block the weft yarn during cutting thereof, to be associated to measuring weft feeders

Publications (1)

Publication Number Publication Date
US6006794A true US6006794A (en) 1999-12-28

Family

ID=11372282

Family Applications (1)

Application Number Title Priority Date Filing Date
US09/043,651 Expired - Fee Related US6006794A (en) 1995-09-27 1996-09-26 Device to block weft yarn during cutting on a weft feeder

Country Status (9)

Country Link
US (1) US6006794A (cs)
EP (1) EP0939838B1 (cs)
JP (1) JPH11511517A (cs)
KR (1) KR19990063819A (cs)
CN (1) CN1060237C (cs)
CZ (1) CZ287951B6 (cs)
DE (1) DE69617756T2 (cs)
IT (1) IT1277659B1 (cs)
WO (1) WO1997012084A1 (cs)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040216498A1 (en) * 2001-05-29 2004-11-04 Birger Johansson Stopper magnet for a measuring yarn feeder

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1012559A3 (nl) * 1999-03-17 2000-12-05 Wiele Michel Van De Nv Inslagdraadrem voor een weefmachine.
DE102006025968B3 (de) * 2006-06-02 2007-11-29 Lindauer Dornier Gmbh Verfahren zum Klemmen eines Schussfadens in einer Düsenwebmaschine, insbesondere Luftdüsenwebmaschine, Klemmeinrichtung und Düsenwebmaschine
BE1019609A3 (nl) * 2009-04-28 2012-09-04 Picanol Opslagelement voor inslagdraad.
CN102454006A (zh) * 2010-10-29 2012-05-16 吴江东益纺织有限公司 喷水织机压线装置
CN104652025A (zh) * 2015-03-12 2015-05-27 青岛同春机电科技有限公司 一种玻纤喷气织机用电子压边机构
IT201700014592A1 (it) * 2017-02-10 2018-08-10 Roj S R L Freno elettromagnetico di arresto del filo di trama in macchine tessili
CN108820994B (zh) * 2018-04-24 2020-06-16 安徽春辉仪表线缆集团有限公司 一种放线治具

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4494579A (en) * 1982-11-08 1985-01-22 Saurer Diederichs Societe Anonyme Thread clamp, particularly for jet looms
US4632155A (en) * 1983-10-07 1986-12-30 Roj Electrotex, S.P.A. Electromagnet for stopping the unwinding of the weft yarn in weft feeding devices for weaving looms
EP0239055A1 (en) * 1986-03-25 1987-09-30 ROJ ELECTROTEX S.p.A. Device for damping weft yarn oscillations and vibrations in weft feeders for air looms
EP0363938A1 (en) * 1988-10-14 1990-04-18 ROJ ELECTROTEX S.p.A. Electromagnetic unit to block the weft yarn in measuring weft feeders for jet looms
EP0622485A1 (en) * 1993-04-08 1994-11-02 L.G.L. ELECTRONICS S.p.A. Modulated thread breaking device for weft feeders
EP0652312A1 (en) * 1993-11-05 1995-05-10 L.G.L. ELECTRONICS S.p.A. Device for the positive modulated braking of thread for weft feeders
US5462096A (en) * 1991-08-22 1995-10-31 Iro Ab Measuring weft feeder with yarn clamping action
US5590693A (en) * 1994-07-19 1997-01-07 L.G.L. Electronics S.P.A. Rotatable thread arrester for weft feeders for air-jet looms
US5623973A (en) * 1992-12-03 1997-04-29 Iro Ab Weft-thread measuring feeder having a circumference adjusting spreading body
US5699031A (en) * 1993-06-03 1997-12-16 Nuova Roj Electrotex S.R.L. Electromagnetic actuator with rotary core

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4494579A (en) * 1982-11-08 1985-01-22 Saurer Diederichs Societe Anonyme Thread clamp, particularly for jet looms
US4632155A (en) * 1983-10-07 1986-12-30 Roj Electrotex, S.P.A. Electromagnet for stopping the unwinding of the weft yarn in weft feeding devices for weaving looms
EP0239055A1 (en) * 1986-03-25 1987-09-30 ROJ ELECTROTEX S.p.A. Device for damping weft yarn oscillations and vibrations in weft feeders for air looms
EP0363938A1 (en) * 1988-10-14 1990-04-18 ROJ ELECTROTEX S.p.A. Electromagnetic unit to block the weft yarn in measuring weft feeders for jet looms
US5016681A (en) * 1988-10-14 1991-05-21 Roj Electrotex S.P.A. Electromagnetic blocking unit for a weft storage drum
US5462096A (en) * 1991-08-22 1995-10-31 Iro Ab Measuring weft feeder with yarn clamping action
US5623973A (en) * 1992-12-03 1997-04-29 Iro Ab Weft-thread measuring feeder having a circumference adjusting spreading body
EP0622485A1 (en) * 1993-04-08 1994-11-02 L.G.L. ELECTRONICS S.p.A. Modulated thread breaking device for weft feeders
US5699031A (en) * 1993-06-03 1997-12-16 Nuova Roj Electrotex S.R.L. Electromagnetic actuator with rotary core
EP0652312A1 (en) * 1993-11-05 1995-05-10 L.G.L. ELECTRONICS S.p.A. Device for the positive modulated braking of thread for weft feeders
US5590693A (en) * 1994-07-19 1997-01-07 L.G.L. Electronics S.P.A. Rotatable thread arrester for weft feeders for air-jet looms

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040216498A1 (en) * 2001-05-29 2004-11-04 Birger Johansson Stopper magnet for a measuring yarn feeder
US6868871B2 (en) * 2001-05-29 2005-03-22 Iropa Ag Stopper magnet for a measuring yarn feeder

Also Published As

Publication number Publication date
ITMI951983A1 (it) 1997-03-27
EP0939838B1 (en) 2001-12-05
ITMI951983A0 (cs) 1995-09-27
CZ287951B6 (cs) 2001-03-14
CN1060237C (zh) 2001-01-03
CZ87698A3 (cs) 1998-07-15
WO1997012084A1 (en) 1997-04-03
DE69617756T2 (de) 2002-08-08
IT1277659B1 (it) 1997-11-11
DE69617756D1 (de) 2002-01-17
EP0939838A1 (en) 1999-09-08
JPH11511517A (ja) 1999-10-05
CN1198195A (zh) 1998-11-04
KR19990063819A (ko) 1999-07-26

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AS Assignment

Owner name: NUOVA ROJ ELECTROTEX S.R.L., ITALY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:COVELLI, MARCO;REEL/FRAME:009112/0320

Effective date: 19980317

REMI Maintenance fee reminder mailed
LAPS Lapse for failure to pay maintenance fees
STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362

FP Lapsed due to failure to pay maintenance fee

Effective date: 20031228